Answer:
1)There is no movement. You stand still, gravity pulls you down but the ground prevents you from moving so gravity does no work on you.
2)There is movement but it is not in the direction of the force (at all). The most common example of this is a catr travellling along a horizontal road. gravity neither helps nor hinders the car. It does no work on the car because the car does not move in the direction of the graviational force. Notice that once the road is inclined, the car partly moves in the direction of gravity and it has some effect. It reduces your kinetic energy if you were going uphill and increaes it when coming down.
